Acid guide



Dec. l, 1936. H. Hol-'MANN ET A1. 2,052,714

ACID GUIDE Filed April 22, 195s Patented Dec. 1, 1936 UNITED STATES ACID GUIDE Hugo Hofmann and Kurt Richter, Elizabethton,"

Tenn., assignors to The American Bemberg Corporation, New York, N. Y., a corporation vof Delaware Application April 22, 1933, Serial No. 667,461

10 Claims.

Our present invention has to do with a device for use in the spinning of artificial filaments but primarily has for its purpose a new guiding means for use in the wet-spinning method of cuprammonium filaments.

One object of the present invention is to provide a means to bring the laments in low tension to the reels with the result of improved physical qualities to the aforementioned filaments.

Another object of the present invention is to provide an acid guide which will eliminate tension due to friction in the methods used heretofore in the spinning of filaments thereby improving the elongation and elasticity of said filaments.

Still another object of the present invention is to provide an acid guide which will always have a free and uniform iicw of treating solution, thereby resulting in a more even coagulation of the laments.

These and other objects will in part become obvious and in part be pointed out in the following specification and attached drawing, in which:

Figure 1 is a somewhat diagrammatic side elevation of the arrangement of apparatus which is believed to be novel and with the acid guide which is a part of the invention shown in use;

Figure 2 is a so-mewhat diagrammatic side elevation of a modification of the apparatus shown in Figure 1;

Figure 3 is an enlarged detail cross sectional View of the reciprocating pipe member and acid guide; and

Figure 4 is a view similar to Figure 3 of the acid guide modified to enable it to be used as shown in Figure 2.

In the following specification in which like reference numerals indicate like parts, `l indicates the filaments which are extruded through the funnel 2 in the usual fashion and pass around the guide rod 3. The filaments 1 then pass through the upstanding pipe members 4 which are paired,

that is two to each bundle of filaments extruded from each funnel of a spinning machine.

These pipes ll are integrally attached to a reciprocating pipe 5. This pipe 5, which takes the place of the usual traversely reciprocating acid guide holder, acts to conduct the coagulating solution from the source of supply (not shown) to the paired upstanding pipe members -4 Awhich act as guides for laying the threads or filaments on the reels 'l in the desired cross winding employed in the art.

This coagulating solution is forced up through the upstanding pipe members 4 and-is ejected in tiny streams through the apertures 6 which are in spaced arrangement on each inner side of each pipe member 4. That is, each set of guide pipe members 4 has a steady ow of coagulating liquid always directed toward the bundle of filaments passing through. In order to spray the reel atthe same time, the pipe 5 has apertures 8 through which the coagulating solution sprays forth over the reel.

As can readily be seen in Figure 1 of the drawy ing, the filaments bear only against the pipe l" members 4 and not against the pipe 5. kIn other words the vfilaments pass through and not over the acid guide. The line of filaments between the guide rod 3 and the take-upk reel l is a straight une and not angled as is usual in the art. it

The friction is therefore negligible inasmuch as the acid guide merely `bears against the filaments to give the desired cross wind on the reell l. Y

This arrangement also eliminates the increased tension caused heretofore by the building up of the yarn in diameter on the reel thereby causing the feed angle between acid guide and take-up reel to vbecome greater resulting in the aforementioned increase of tension.

The result of applicants arrangement is therefore the production of a more uniform quality yarn and one which has an elongation of approximately double that `of any previously produced.

With the above disclosed arrangement there is an elongation of 25% to 30% inthe dry state.

In the Wet state, the filaments have an elongation of over 40%.

In view of the fact that manufacturers of textile goods need and desire a yarn with sufficient f elasticity, it is obvious that the above improved elongation will give a corresponding increase in this long-felt want. 4

The limited elasticity of artificial silk fibre, compared with real silk,.has Aalways entailed special care if the former is used with warp threads the guide rod 3, theycontinue straight down and pass through the pipe members lLwhich vare now extended horizontally, and then pass to the reel 'liretaining the same direction throughout.

The pipe 5 operates in exactly the same manner as described and illustrated in my preferred form.

In this case, however, the acid which is sprayed on the reel l comes fromA apertures 9 formed in the ends of thepipe members 4.

In order that the precipitating solution may not mix with the coagulating acid solution which would be the case should the first mentioned solution run down the laments unhindered, a roller Il) is placed just below the nippleo'f Vthe funnel 2 and in a position barely touching the filaments I. This roller l0 serves to deflect the precipitating liquid into a trough l! which serves to draw off the precipitating solution and prevent it mixing with the above mentioned coagulating acid solution.

In this form as illustrated in Figure 2 of the drawing, the utmost elongation is obtained due to the fact that a minimum of friction is encountered with a corresponding decrease of tension and a resulting maximum of elongation with its proportionate increase of elasticity.

In this form, only the pipe members 4 in their traversely oscillating motion bear on the bunches of filaments.

With this arrangement an elongation of over 30% in the dry state is obtained and in the wet state of over 50%.

From the foregoing description taken in connection with the accompanying drawing, it is thought that the advantages and benefits derived from the invention will be clearly apparent to those skilled in the art to which it relates.

We claim:

1. An acid guide for use in the manufacture of yarn of artificial origin comprising a feed pipe having spaced pipe members attached integrally thereto, and perpendicular to the axis of said feed pipe, said spaced pipe members being adapted to act as fingers through which the yarn is drawn, said pipe members having apertures on their inner side for the purpose of ejecting a treating solution inwardly toward the yarn.

2. An acid guide, adapted to be used in the manufacture of yarn of artificial origin, comprising, a feed pipe having apertures for ejecting a treating solution, said feed pipe having spaced pipe members attached integrally thereto, and perpendicular to the axis of said feed pipe, said spaced pipe members adapted to act as fingers through which the yarn is drawn, said pipe members having apertures on their inner side for the purpose of ejecting a treating solution inwardly toward the yarn.

3. An acid guide adapted to be used in the manufacture of yarn of artificial origin comprising a traversely reciprocating feed pipe having spaced pipe membersattached integrally thereto, and perpendicular to the axis of said feed pipe, said spaced pipe members adapted to act as fingers through which\the yarn is drawn, said pipe members having apertures on their inner side for the purpose of ejecting a treating solution inwardly toward the yarn, said pipe members having apertures at their upper ends for ejecting a treating solution therethrough.

4. In the manufacture of artificial filaments according to the cuprammonium process, the steps of extruding the filaments into a precipitating bath owing concurrently with the said filaments, passing them around a guide rod at an obtuse angle, and passing the filaments in a straight line from said guide through an acid guide to a collecting means, whereby said acid guide merely bears against the filaments to give the desired cross wind on said collecting means.

5. In the manufacture of artificial filaments according to the cuprammonium process, the steps of extruding the filaments into a precipitating bath flowing concurrently with the said filaments, passing them in a straight line through said bath and acid guide to a collecting means, whereby said acid guide merely bears against the filaments to give the desired cross wind on said collecting means.

6. In the manufacture of artificial filaments according to the cuprammonium process, the steps of extruding the filaments into a precipitating bath flowing concurrently with the said filaments, passing them around a guide rod at an obtuse angle, passing them in a straight line through an acid guide to a collecting means, whereby the only tension imposed on the filaments is caused by the acid guide bearing on the filaments to give the desired cross wind, and further treating the filaments with an acidic solution on said collecting means.

7. In a device of the class described, in combination, a spinning funnel through which yarn of artificial origin is extruded, a take-up means, and thread guide associated therewith, the said take-up means and thread guide positioned below said extrusion means whereby the yarn may be received under little or no tension, said thread guide comprising a traversely reciprocating feed pipe having spaced pipe members attached integrally thereto, and perpendicular to the axis of said feed pipe, said spaced pipe members adapted to act as fingers through which the extruded yarn is drawn, said pipe members having apertures on their inner side for the purpose of ejecting a treating solution inwardly toward the yarn.

8. In a device of the class described, in combination, a spinning funnel through which yarn of artificial origin is extruded, a guide rod positioned directly below said funnel around which the yarn is passed, a take-up means and thread guide associated therewith, said take-up means and thread guide positioned below and slightly forward of the vertical axis of said funnel whereby thread passing from said guide rod to said take-up means passes around the said guide rod at an obtuse angle, said thread guide comprising a traversely reciprocating feed pipe having spaced pipe members attached integrally thereto, and perpendicular to the axis of said feed pipe, said spaced pipe members adapted to act as fingers through which the extruded yarn is drawn, said pipe members having apertures on their inner side for the purpose of ejecting a treating solution inwardly toward the yarn.

9. In a device of the class described, in combination, a spinning funnel through which yarn of artificial origin is extruded, a take-up means located below said funnel, the vertical axis of said funnel being substantially tangential to the periphery of said take-up means, a thread guide associated with said take-up means and comprising a traversely reciprocating feed pipe having spaced pipe members attached integrally thereto, and perpendicular to the axis of said feed pipe, said spaced pipe members adapted to act as fingers through which the extruded yarn is drawn, said pipe members having apertures on their inner side for the purpose of ejecting a treating solution inwardly toward the yarn.

10. In the manufacture of artificial filaments according to the cuprammonium process, the steps of extruding the filaments into a precipitating bath flowing concurrently with the said filaments, passing the filaments in a straight line through said bath and through an acid guide to a collecting means, whereby said guide merely bears against the filaments to impart the desired cross wind on said collecting means, and further treating the filaments with an acidic solution on said collecting means.

HUGO HOFMANN. KURT RICHTER. 

